Group Adding Cunt - One of those ballbags that you see on Facebook that joins literally every single group that's possible, even if it doesn't link to them in anyway; they still join the groups. Each day a G.A.C. will fill up your homepage with groups that relate to nothing.

1. This is probably what a G.A.C. says to them self on a regular basis, "I'm a wanker, let's join every group."

2. That G.A.C. on my homepage is joining all the groups today...again.

Synonymous with modern day derogatory, foul or vulgar language, signifying someone's distaste for something. Can be used to humiliate, agitate, irritate and maliciously depropriate anything, person or place. Can be used as an Adverb or Adjective to emphasize feeling and frustration towards virtually anything.

What the GAC is wrong with you???
GAC you, you GACing GAC!
You are a GACing Idiot!
What the GAC did Bongwater say?
Get the GAC outta my face, you GACass!